| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.ozone.common; |
| |
| import org.apache.hadoop.util.PureJavaCrc32; |
| import org.apache.hadoop.util.PureJavaCrc32C; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import java.nio.charset.StandardCharsets; |
| import java.util.Random; |
| import java.util.zip.Checksum; |
| |
| /** |
| * Test {@link ChecksumByteBuffer} implementations. |
| */ |
| public class TestChecksumByteBuffer { |
| @Test |
| public void testPureJavaCrc32ByteBuffer() { |
| final Checksum expected = new PureJavaCrc32(); |
| final ChecksumByteBuffer testee = new PureJavaCrc32ByteBuffer(); |
| new VerifyChecksumByteBuffer(expected, testee).testCorrectness(); |
| } |
| |
| @Test |
| public void testPureJavaCrc32CByteBuffer() { |
| final Checksum expected = new PureJavaCrc32C(); |
| final ChecksumByteBuffer testee = new PureJavaCrc32CByteBuffer(); |
| new VerifyChecksumByteBuffer(expected, testee).testCorrectness(); |
| } |
| |
| static class VerifyChecksumByteBuffer { |
| private final Checksum expected; |
| private final ChecksumByteBuffer testee; |
| |
| VerifyChecksumByteBuffer(Checksum expected, ChecksumByteBuffer testee) { |
| this.expected = expected; |
| this.testee = testee; |
| } |
| |
| void testCorrectness() { |
| checkSame(); |
| |
| checkBytes("hello world!".getBytes(StandardCharsets.UTF_8)); |
| |
| final Random random = new Random(); |
| final byte[] bytes = new byte[1 << 10]; |
| for (int i = 0; i < 1000; i++) { |
| random.nextBytes(bytes); |
| checkBytes(bytes, random.nextInt(bytes.length)); |
| } |
| } |
| |
| void checkBytes(byte[] bytes) { |
| checkBytes(bytes, bytes.length); |
| } |
| |
| void checkBytes(byte[] bytes, int length) { |
| expected.reset(); |
| testee.reset(); |
| checkSame(); |
| |
| for (byte b : bytes) { |
| expected.update(b); |
| testee.update(b); |
| checkSame(); |
| } |
| |
| expected.reset(); |
| testee.reset(); |
| |
| for (int i = 0; i < length; i++) { |
| expected.update(bytes, 0, i); |
| testee.update(bytes, 0, i); |
| checkSame(); |
| } |
| |
| expected.reset(); |
| testee.reset(); |
| checkSame(); |
| } |
| |
| private void checkSame() { |
| Assert.assertEquals(expected.getValue(), testee.getValue()); |
| } |
| } |
| } |